摘要
低品位复杂物料中杂质元素含量高,其分配行为对熔炼工艺条件及产品质量具有很大影响。针对低品位铅铋物料氧化熔炼及其氧化渣还原熔炼两段工艺开展研究,考察了各因素对元素分配行为的影响。结果表明:氧化熔炼最佳工艺条件为:通氧量200 L/kg,铁硅质量比1.3,钙硅比0.4。在此工艺条件下,铅、铋、铜、锌、砷和锑在渣中分配比例分别为47.05%、7.37%、10.93%、55.12%、55.86%和47.59%。还原熔炼最佳工艺条件为:铁硅质量比1.2,钙硅质量比0.8,还原剂用量为理论量的1.3倍,还原时间60 min。在此工艺条件下,铅、铋、铜、锌、砷和锑直收率分别为93.34%、99.60%、49.58%、84.38%、49.31%和87.26%。
The high impurity content of low grade complex material proposes great influence on bath smelting process parameters as well as product quality.The oxidation smelting of low-grade lead-bismuth materials and reduction smelting of the oxidized slag were studied experimentally.The effects of various factors on elements distribution behaviors in the smelting process was investigated.The results show that the optimum process conditions of oxidation smelting process are as follows:200 L/kg oxygen to raw material,m(FeO)/m(SiO2)of 1.3,m(CaO)/m(SiO2)of 0.4.Under the optimum condition,the distribution ratios of Pb,Bi,Cu,Zn,As and Sb in the oxidized slag are 46.69%,7.37%,10.93%,55.12%,55.86%and 47.59%,respectively.At the reduction smelting step,the optimum smelting conditions are as follows:m(FeO)/m(SiO2)of 1.2,m(CaO)/m(SiO2)of 0.8,1.3 times of the theoretical reducing coal consumption,reducing time 60 min.Under the optimum conditions,the direct recoveries of Pb,Bi,Cu,As and Sb can reach 93.34%,99.60%,49.58%,84.38%,49.31%and 87.25%,respectively.
作者
杨天足
肖辉
陈霖
陈威
刘伟锋
张杜超
YANG Tian-zu;XIAO Hui;CHEN Lin;CHEN Wei;LIU Wei-feng;ZHANG Du-chao(School of Metallurgy and Environment,Central South University,Changsha 410083,China;Hunan Jinwang Bismuth Industry Co.,Ltd.,R&D center of post-doctoral research station,Chenzhou 423000,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2018年第9期1883-1892,共10页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学青年基金资助项目(51404296)
中国博士后科学基金面上项目(2016M602427)
湖南省自然科学青年基金资助项目(2018JJ3662)~~
关键词
铅
铋
低品位复杂物料
熔池熔炼
元素分配
lead
bismuth
low-grade complex material
bath smelting
element distribution
